Will a 2006 3650 be a replacment for my 03 3650 is there any diffirences? will it work

 

From what I know a trans model is a trans model, otherwise they would have to call it somthing different. So, in this case, a 3650 is a 3650 regardless of the year vehicle it is used in. That being said, the shifter positions are different for the 2003 and 2006 but I assume this is to fit the body style of the car, not a transmission model modification. SO BE CAREFUL. 2001- 2004 GTs' 3650 have top loading shifters while 2005- 2008 GTs' 3650s have remote mounted shifters.

 

....is that why you're asking?